Wiring diagrams and CAD

[NC Cams]

I have some old, hand drawn wiring diagrams for some lathes and relay boards. I'd like to convert them to CAD and do NOT want to buy a CAD program (ala Autocad) to have to do so.

I'm looking for a stand alone program that will enable me to recreate the machine control wiring diagrams. It is basically small rectangular boxes with letters and numbers in them linke to each other by long, nicely drawn, squared off lines.

Motors are simple circles, push buttons are two circles with a line sitting a bit above them to denote momentary contact, I'm sure you know what I mean.

The optimum one would print out on A thru D size paper so that a "blueprint" could be carried out to the machine to read it. Anyone who's seen a Bridgeport wiring schematic (see attached) knows what I'm trying to duplicate, layout wise.

[phantomcow2]

Qcad? That came free on my Linux distro, they may have a windows version out there as well